I know but I was wondering how would fit the elite animations that goes around them.

I played a bit with it, parsing the code if you want to have a look at it.

I tested many things but finally focused on the health bar size before going further.

Set the player vitals size to to 1.6 and use the code below, I didn't move the bars so you can test with any default UI without re-doing vitals backgrounds.
If you keep the opponent vital size to 1.0 you can check them against the player ones to see how they fit.